3 problems achieving a 10:00 minute countdown clock animation. (non-repeating seconds, changing 100 units to units of 60, minutes not following math)
Use math operator integer modulus relative to a frame number.
pseudo programming language ... I think you can translate this to BAN
time = (10 * 60 )- ((frame - offset)) #bias can be used
hour = integer(time/60)
minute = time % 60 # modulus operation

please improve